A man in Washington has been diagnosed with a strain of the bird flu that’s never been detected in humans before. The individual ― an older adult with underlying conditions who has been hospitalized since early November ― tested positive for a subtype called H5N5. According to a press release from the Washington State Department of Health, the man likely contracted the virus from the domesticated poultry he kept in his backyard, which were exposed to wild birds known to carry several strains of